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FAG imported bearing fault judgment method

Author: admin Add Time: 2019-5-29 13:32 Views: 276 times

When the surface of SKF imported bearing components is peeled off, indented or partially corroded, it will have a periodic pulse signal during operation. This periodic signal can be received by a sensor (speed or acceleration type) mounted on the bearing housing to diagnose the fault of the SKF imported bearing by analyzing the vibration signal.

Features: Vibration diagnostic technology is widely used; online monitoring can be realized; diagnosis is fast, and diagnostic theory is mature. Application range: It is especially suitable for fault monitoring of SKF imported bearings in rotating machinery. Second, the iron spectrum diagnostic technology

SKF imported bearing wear particles are closely related to their working conditions. Under the action of strong magnetic field, the abrasive particles with lubricating oil are deposited on the iron spectrum according to a certain rule. The iron spectrum can be qualitatively observed on a ferrography microscope or tested on a quantitative instrument. According to this, SKF imported bearings are judged. Working condition

Features: The machine does not need to be disassembled; the investment is low, the effect is good; the early fatigue failure of SKF imported bearings can be found; the wear mechanism can be studied.

Scope of application: It is suitable for the fault diagnosis of SKF imported bearings lubricated with lubricating oil. It is difficult for SKF imported bearings with grease lubrication.

Third, oil film resistance diagnostic technology

The well-lubricated SKF bearings have a large resistance between the inner and outer rings due to the action of the oil film. Therefore, by measuring the resistance of the inner and outer rings of SKF bearings, the abnormality of SKF bearings can be judged.

Features: The same criteria can be used for different working conditions. It has a poor diagnostic effect on abnormalities such as surface peeling, indentation, and cracks. Application range: Suitable for occasions where the rotating shaft is exposed.

Fourth, optical fiber monitoring and diagnosis technology

Fiber Monitoring is a diagnostic technique that extracts signals directly from the surface of SKF's imported bearing rings. A displacement sensor made of an optical fiber bundle includes an emission fiber bundle and a reception fiber bundle. The light is reflected back from the gap between the end face of the sensor and the surface of the bearing ring by the transmitting fiber bundle, received by the receiving fiber bundle, converted into an electrical signal by the photoelectric element, and the bearing condition can be evaluated by analyzing and processing the electrical signal.

Features: The fiber displacement sensor has high sensitivity; the signal is directly extracted from the bearing surface of SKF imported bearings, which improves the signal-to-noise ratio; it can directly reflect the manufacturing quality, surface wear degree, load, lubrication and clearance of the rolling bearing. Application: Suitable for machines that can mount sensors in SKF imported housings. Fifth, temperature diagnosis technology

If the SKF imported bearings produce some kind of abnormality, the temperature of the bearing will change. Therefore, according to changes in temperature, SKF imported bearing faults can be diagnosed, but the ability to judge abnormalities is very low. Features: Simple diagnosis; good judgment on SKF imported bearing burns. Scope of application: Suitable for simple routine diagnosis of SKF bearings in machines.

Sixth, acoustic emission diagnostic technology

Metal materials need to release elastic waves due to internal lattice dislocations, grain boundary slip or due to the occurrence and development of internal cracks. This phenomenon is called acoustic emission. When the rolling bearing is spalled or cracked, different types of acoustic emission signals are generated, which can be used to evaluate the SKF imported bearing condition.

Features: Quick and easy diagnosis; online monitoring.

Scope of application: The new technology developed in recent years is rarely used in SKF imported bearing condition monitoring.